client-error-document-format-not-supported

[skylupo]

hello all,

i'm trying to install my new photosmart 7450, and i'm obtaining the client-error-document-format-not-supported error each time i try to print a test page.

i'm running debian and kde, i installed the hplip driver (http://hplip.sourceforge.net/).

i googled a lot of course, and i found 2 solutions:

1- edit the mime.types and mime.confs files and uncomment de lines 'application/octet-stream ' at the bottom

2- in kde control panel, reconfigure the cups server to listen to localhost:631

i tried both, i restarted cups each time, with no errors at the starting, but if i try to print something (lp /etc/passwd) i get client-error-document-format-not-supported .
i get the same msg if i try to print a test page from the webadmin page of cups (http://localhost:631/admin)

i removed cups, reinstalled it, but the pb remains.
i really don't know what else i can try :(

it's like the cups server wasn't able to read the mime.types and mime.confs files.

certainly i missed something, certainly it's a stupid thing, but i can't find it.

someone to help me pleaz?